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Finding the Fourth Proportional to 422,878.51, 634,250.21 and 123,289.01

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Solution

The fourth proportional to 422,878.51, 634,250.21 and 123,289.01 is: 184,913.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    422,878.51 : 634,250.21 = 123,289.01 : x
  2. Step 2: Convert to fraction form
    422,878.51/634,250.21 = 123,289.01/x
  3. Step 3: Cross multiply
    422,878.51x = 634,250.21 × 123,289.01
  4. Step 4: Simplify right side
    422,878.51x = 78,196,079,866.75
  5. Step 5: Solve for x
    x = 78,196,079,866.75/422,878.51
  6. Step 6: Final answer
    x = 184,913.82

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.